Pest identification
What's eating my disocactus phyllanthoides?
Mealybugs
Signs: Powdery white clusters in stem notches and where stems branch; feeding stunts new pads and can prevent flowering
Control: Dab with alcohol-soaked cotton buds; spray diluted neem oil over entire plant; quarantine affected plant from other epiphytes
Spider mites
Signs: Pale or bronze silvery stippling on flat stem faces; mites multiply quickly in warm, low-humidity indoor air in winter
Control: Increase air humidity; spray insecticidal soap solution thoroughly to both surfaces of flat stems; repeat weekly for 3 weeks
Scale insects
Signs: Small hard brown or off-white shells along stem edges and ridges; honeydew secretions lead to sooty mould on stems
Control: Scrape off with a soft toothbrush; wipe with alcohol; apply horticultural oil if reinfestation recurs
Keep disocactus phyllanthoides pest-free
Healthy plants resist pests best. Get the basics right:
Disocactus phyllanthoides pests — FAQ
What is eating my disocactus phyllanthoides?
Disocactus phyllanthoides (orchid cactus) grown for its showy blooms is most plagued by mealybugs hiding in the notched edges of its flat stems. Spider mites thrive indoors in dry air, causing silvery scarring. Scale insects occasionally encrust the stem edges. Fungus gnats colonise overly moist bark mix.
How do I get rid of mealybugs on disocactus phyllanthoides?
Powdery white clusters in stem notches and where stems branch; feeding stunts new pads and can prevent flowering Dab with alcohol-soaked cotton buds; spray diluted neem oil over entire plant; quarantine affected plant from other epiphytes
How do I get rid of spider mites on disocactus phyllanthoides?
Pale or bronze silvery stippling on flat stem faces; mites multiply quickly in warm, low-humidity indoor air in winter Increase air humidity; spray insecticidal soap solution thoroughly to both surfaces of flat stems; repeat weekly for 3 weeks
How do I get rid of scale insects on disocactus phyllanthoides?
Small hard brown or off-white shells along stem edges and ridges; honeydew secretions lead to sooty mould on stems Scrape off with a soft toothbrush; wipe with alcohol; apply horticultural oil if reinfestation recurs